Device for mixing gases.



Patented 0ct. 19, 1915.

A. c. CLARK. V DEVICE FOR MIXING GASES.

APPLICATION FILED APR. 1. I914.

llllllliiiiilii -5 a cross section of the. same.

UNITE STATES FATE FFICE."

ALBERT CHARLES CLARK, OF CHICAGO, ILLINOIS, ASSIGNOR TO A. C. CLARK & COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

DEVICE FOR MIXING GASES.

Application filed April 1, 1914.

To all whom it may concern.

Be it known that I, ;\LBERT CHARLES CLARK, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Devices for Mixing Gases, of which the following is a specification.

Thedevice which constitutes the subjectmatter of my present invention was 'devised as an improvement upon, or. an attachment to an apparatus for administering a mixture of nitrous oxid and oxygen gases for producing anesthesia, such as is shown in my pending application for Patent No.

686,252, filed lWIarch 26, 1912.

The object of my invention is the provision of a compact, simply constructed and efficient device for producing an intimate physical mixing of the gases. easily applied, and the action of which can be readily observed As is well known the gases mentioned do not enter into a chemical combination, but form a physical mixture, and it is highly desirable that the mixing shall be as complete and perfect as possible.

Vith the foregoing and incidental objects and advantages in view, my invention consists in the construction and arrangement of parts hereinafter described, the essential elements of which are recited in the appended claims.

It is unnecessary to an understanding of my present invention to describe in detail the entire construction of the anesthetic apparatus to which it is applied, and I have therefore illustrated in the drawing only those parts of such apparatus as are directly related to this invention.

In the drawing, Figure 1 shows a llOll'LOl'ltal section of, an apparatus such as is'described in my above-mentioned prior application, with the mixing device constituting my invention appliedthereto; Fig. 2 is an enlarged horizontal section of my 'mi'xing device; Fig. 3 is an end" elevation of the same; Fig. 4 is a fragmental central section of a modified form of mixer; and Fig.

that the casing 4 of theapparatus is pro- Specification of Letters Patent.

breathing apparatus.

Patented Oct. 19, 1915. Serial No. 828,649. C

vided on its interior with two passages, 7

and 8, one of which, as the passage 7, communicates with a supply of nitrous oxld and the other with a supply of oxygen. The passages 7 and 8, separated by the wall 9, are adapted to be placed in communica tion, through ports 12 and 13, with a large bridging port opening into the interior of a hollow plug valve 10, and thence through another large port 1% and my mixing device with the large annular chamber 15, which in turn communicates with the outlet 16 through which the mixed gases pass to the The ports governed by the plug valve 10, as will be seen by reference to the drawing. are so arranged and related that bv a proper rotary adjustment of the valve, through means unnecessary to be described, either gas alone or amixture of the gases in any desired proportion may be formed, or both gases may be entirely shut ofl".

My mixing device is arranged directly opposite the port 14 and in such close proximity thereto as to be directly in the path of the two streams of gas passing through the valve. The shell or case A of the mixer is flanged and screw-threaded to adapt it to seat in the boss B of the casing}. An inner spider C and outer spider. D are equipped with bearings, between which is mounted a spindle E carrying what for convenience of description I will term a screw fan F. In the present instance the-outer end of the spindle is coned and rotates in a jewel bearextending from a plane adjacent the'outer points of the blades of the fan outwardly, permit unobstructed passage of the mixed gases into the chamber 15.

From the description which has been given, it is apparent that the streams of nitrous oxid. and oxygen passing through the mixing device will act upon the spirally inclined blades of the screw fan to cause it to rapidly revolve, and that this rotation of the fan will operate to mingle the streams and produce an intimate mechanical mixture of the two gases.

Referring now to the modification shown in Figs. at and 5, the outer end of the mixing device there illustrated may be threaded and shouldered exactly like the form hereinbefore described, to adapt it to be seated in the same manner in the boss B of the casing 4. In this modification, however, the blades J, which are curved in spirally inclined form from the inner to the outer end of the cylindrical shell portion of the mixer, are secured at their outer edges to such shell, this structure creating a strong eddying or whirling movement which will cause the two gases to be effectively mixed as they pass below the blades and out through the openings K into' the chamber l5 of the apparatus. I claim: a 1. Inapparatus of the character described and having a casing formed with an annular chamber and central valve means for supplying different gases in a common radial stream, a cylindrical shell having a base portion seated in the outer wall of said annular chamber and a perforated central portion and an open-ended inner portion arranged to receive said stream of gases axially adjacent said valve meansfand spirally inclined deflecting means arranged to produce an eddy in said stream.

In apparatus of the character described and having a casing formed with an annular chamber and central valve means for supplying different gases in a common radial stream, a cylindrical shell having a base portion seated in the outer ivall of said annular chamber and a perforated central portion and an open-ended inner portion arranged to receive said stream of gases axially adjacent said valve means, two spider frames arranged respectively in said base portion and said inner portion, and a screw fan mounted axially of the shell in said spider frames.

' 3. In apparatus of the character described and having a casing formed with an annular chamber and central valve means for supplying different gases in a common radial stream, a cylindrical shell having a base portion seated in the outer wall of said annular chamber and a perforated central portion and an open-ended inner portion arranged to receive said stream of gases axially adjacentsaid valve means, a transparent window closing the outer end of said base portion, two spider frames arranged respectively in said base portion and said inner portion, and a screw fan mounted axially of the shell in said spider frames.

ALBERT CHARLES CLARK. Witnesses:

LOUIS B. ERWIN, ROBERT DOBBERMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

